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Goodwill and Intangible Assets (Tables) | 6 Months Ended
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Mar. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill [Table Text Block] | The following summarizes the carrying value of goodwill by segment at March 31, 2023, which was unchanged from September 30, 2022:
| Communications |  | Residential |  | Infrastructure Solutions |  | Commercial & Industrial |  | Total
Goodwill at March 31, 2023 |  | $ | 2,816 |  |  | $ | 51,370 |  |  | $ | 38,209 |  |  | $ | — |  |  | $ | 92,395 |
Schedule of Finite-Lived Intangible Assets [Table Text Block] | Intangible assets consist of the following:
|  | Estimated Useful Lives (in Years) |  | March 31, 2023
|  |  |  | Gross Carrying Amount |  |  | Accumulated Amortization |  | Net
Trademarks/trade names |  | 5 | - | 20 |  |  | $ | 14,621 |  |  |  | $ | (5,014) |  |  |  | $ | 9,607 |
Technical library |  | 20 |  |  | 400 |  |  |  | (191) |  |  |  | 209 |
Customer relationships |  | 6 | - | 15 |  |  | 91,426 |  |  |  | (37,653) |  |  |  | 53,773 |
Non-competition arrangements |  | 5 |  |  | 40 |  |  |  | (37) |  |  |  | 3 |
Backlog and construction contracts |  | 1 |  |  | 4,958 |  |  |  | (4,958) |  |  |  | — |
Total intangible assets |  |  |  |  |  |  | $ | 111,445 |  |  |  | $ | (47,853) |  |  |  | $ | 63,592 |
|  |  | Estimated Useful Lives (in Years) |  | September 30, 2022
|  |  |  |  | Gross Carrying Amount |  |  | Accumulated Amortization |  | Net
Trademarks/trade names |  | 5 | - | 20 |  |  | $ | 15,262 |  |  |  | $ | (4,589) |  |  |  | $ | 10,673 |
Technical library |  | 20 |  |  | 400 |  |  |  | (181) |  |  |  | 219 |
Customer relationships |  | 6 | - | 15 |  |  | 96,699 |  |  |  | (35,662) |  |  |  | 61,037 |
Non-competition arrangements |  | 5 |  |  | 40 |  |  |  | (33) |  |  |  | 7 |
Backlog and construction contracts |  | 1 |  |  | 4,958 |  |  |  | (4,958) |  |  |  | — |
Total intangible assets |  |  |  |  |  |  | $ | 117,359 |  |  |  | $ | (45,423) |  |  |  | $ | 71,936 |

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